Have not used the service ping content. What is its essence? And how to do this for Joomla? The bottom line is that when you create a new article, we will send a request to the server saying that they say I have created a new short article, come to my website and send it to index.
But to realize there is a wonderful plugin BlogPing. In his settings, you will need to specify a list of servers. That's all :) now when a new article, you'll automatically send the material to index. The developer recommends not using more than 10 ping services at the same time, I have here is about 20-25, and nothing works. Good luck!